I have a serious problem- my domain controller (.100) cannot connect to the Internet unless I change to alternative dns as 184.108.40.206. All my workstations cannot reach the Internet unless I point their dns to 220.127.116.11 as well. This all started after installing trend micro antivirus (offiescan server) and removing Windows Search. Since then I've also removed the antivirus from server and rebooted many times. The Internet will not work unless I'm using an OpenDNS on my network. What can be the cause?